Public water system · FL4131202
ActiveMdwasa/Rex Utilities
At a glance
Mdwasa/Rex Utilities (PWSID FL4131202) is an active community water system in Miami-Dade County, Florida. It reports serving 45,200 people through 12,700 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
45,200
Service connections
12,700
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Mdwasa/Rex Utilities compare with other water systems in Miami-Dade County?
By EPA's size categories, Mdwasa/Rex Utilities is a large system (10,001 to 100,000 people). Miami-Dade County has 172 active public water systems. Its population served is about 134% above the county average of 19,337 people per system, and accounts for 1.4% of the 3,326,006 people reported by systems filed under the county. Across Florida, the 5,197 active systems average 4,345 people each. Nationally, the average active community water system reports serving 6,703 people, so Mdwasa/Rex Utilities is about 6.7 times that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Florida has 1,640 active community water systems, 32% of the state's 5,197 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 4,996 Florida systems (96%) list groundwater as their primary source.
Who owns and regulates Mdwasa/Rex Utilities?
EPA lists Mdwasa/Rex Utilities as owned by a local government. The FL state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 29 of the 172 active systems in Miami-Dade County (17%) are also owned by a local government.
Does Mdwasa/Rex Utilities have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2023. The violations listed here began between January 2022 and October 2023. By type: 7 monitoring and reporting, 3 monitoring and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (4 of them). EPA lists 10 as archived and 2 as unaddressed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2023-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2023-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Archived |
| 2023-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Archived |
| 2023-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Unaddressed |
| 2022-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2022-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Unaddressed |
| 2022-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Archived |
| 2022-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Archived |
| 2022-05-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2022-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Archived |
| 2022-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Archived |
| 2022-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Archived |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Mdwasa/Rex Utilities: frequently asked questions
Who runs Mdwasa/Rex Utilities?
Mdwasa/Rex Utilities (PWSID FL4131202) is a community water system owned by a local government. It is regulated by the FL state drinking water program.
How many people does Mdwasa/Rex Utilities serve?
Mdwasa/Rex Utilities reports serving 45,200 people through 12,700 service connections in Miami-Dade County, Florida.
Where does Mdwasa/Rex Utilities get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Mdwasa/Rex Utilities have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2023. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Mdwasa/Rex Utilities' water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the FL state drinking water program.
Where can I find Mdwasa/Rex Utilities' water quality report?
As a community water system, Mdwasa/Rex Utilities must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Miami-Dade County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mdwasa - Main System | Miami-Dade | 2,377,460 | Community | Groundwater |
| Hialeah, City of | Miami-Dade | 238,000 | Community | Groundwater |
| North Miami Beach | Miami-Dade | 180,000 | Community | Groundwater |
| Miami Beach, City of | Miami-Dade | 100,000 | Community | Purchased groundwater |
| North Miami, City of | Miami-Dade | 89,349 | Community | Groundwater |
| Fkaa J. Robert Dean W.T.P. | Miami-Dade | 86,000 | Community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Mdwasa/Rex Utilities, PWSID FL4131202, Florida”, https://aquacensus.com/water-systems/florida/mdwasa-rex-utilities-fl4131202 (data as of October 1, 2026).